Explain giving reasons the cause of appearance of peaks 'a' and 'b' in the graph shown below:

Explain giving reasons the cause of appearance of peaks 'a' 'b' in th e graph shown below.

Identify P,Q, and R in the graph shown below

Write the function whose graph is shown below:

Repeat the last problem if the graph is as shown below.

Write the function whose graph is shown below.

Explain giving reason why the sky appears blue to an observer from the surface of the earth? What will the colour of the sky be for an astronaut staying in the international space station orbiting the earth? Justify your answer giving reason.